CN107547249A - Link switch-over method, device, SDN switch, controller and storage medium - Google Patents
Link switch-over method, device, SDN switch, controller and storage medium Download PDFInfo
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Abstract
The embodiments of the invention provide a kind of link switch-over method, device, SDN switch, controller and storage medium, wherein, link switch-over method includes：The flow table that SDN controllers issue is received and stores, wherein, flow table includes the priority corresponding to each link, and priority and the link quality parameter of each link are proportional；Monitor multilink of the SDN switch itself between purpose equipment；When being currently used in the first link failure to E-Packet, the priority of flow table item corresponding with the first link in the flow table that is locally stored of modification SDN switch, the priority of flow table item corresponding with the first link is less than the priority of flow table item corresponding to other links in amended flow table；In flow table after the modification, link corresponding to the flow table item of highest priority is selected to E-Packet.The automatic switchover of link can be realized by this programme, so as to reduce packet loss of the message in repeating process, improves the success rate of message forwarding.
Description
Technical field
The present invention relates to network technique field, more particularly to a kind of link switch-over method, device, SDN switch, control
Device and storage medium.
Background technology
Software defined network (Software Defined Network, SDN), is a kind of new network of Emulex network innovation framework, is
A kind of implementation of network virtualization, SDN frameworks include SDN controllers and SDN switch.Based on open flows
In the SDN of OpenFlow agreements, SDN controllers obtain network topology structure by OpenFlow passages, and according to agreement
Generate flow table issuance to SDN switch, SDN switch and carry out Message processing according to the flow table that SDN controllers issue.SDN technologies
By the way that the control plane of the network equipment is separated with datum plane, so as to realize the flexible control of network traffics.
However, role is more and more important in life with network, reliability and security requirement to network
Also more and more higher.When the load of network is very big, whether the network equipment is abnormal restarts, or link disconnection etc., has
The paralysis of network may be caused.
Therefore, in existing SDN, network is usually built using the simultaneous mode of multilink, when wherein
After first link failure, SDN controllers calculate the second link using network topology structure, and update flow table, the stream after renewal
Table instruction SDN switch is E-Packeted using the second link, and then SDN controllers issue the flow table after renewal to SDN switch,
SDN switch determines the use of the second link and forwarded the packet to purpose equipment according to the flow table after the renewal.But in link
Between failure and SDN controllers issue the flow table after renewal, SDN switch is still attempted to turn by the first link of failure
Transmit messages text, so as to which the packet drop for causing message to forward occurs, influence the success rate of message forwarding.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of link switch-over method, device, SDN switch, controller and deposited
Storage media, to reduce packet loss of the message in repeating process, so as to improve the success rate of message forwarding.Concrete technical scheme is such as
Under：
In a first aspect, the embodiments of the invention provide a kind of link switch-over method, exchanged applied to software defined network SDN
Machine, methods described include：
Receive and store the flow table that SDN controllers issue, wherein, the flow table include the SDN switch itself with
The priority of the flow table item corresponding to each link between purpose equipment, the link quality parameter of the priority and each link into
Proportional relation；
Monitor multilink of the SDN switch itself between the purpose equipment；
When being currently used in the first link failure to E-Packet, change in the flow table that the SDN switch is locally stored
The priority of flow table item corresponding with first link, wherein, stream corresponding with first link in amended flow table
The priority of list item is less than the priority of flow table item corresponding to other links；
In flow table after the modification, link corresponding to the flow table item of highest priority is selected to E-Packet.
Second aspect, the embodiments of the invention provide a kind of link switch-over method, applied to SDN controllers, methods described
Including：
Obtain the facility information of SDN switch and the SDN switch in the topology information of SDN, the SDN
Link attribute between purpose equipment；
According to the topology information, the facility information and the link attribute, determine that each SDN is handed in the SDN
Change planes the link quality parameter of between purpose equipment each link；
Generation flow table is simultaneously issued to each SDN switch so that the SDN switch be currently used in E-Packet first
During link failure, the priority of flow table item corresponding with first link in the flow table is changed, in flow table after the modification,
Link corresponding to the flow table item of highest priority is selected to E-Packet, wherein, the flow table item in the flow table corresponding to each link
Priority and the link quality parameter of each link it is proportional.
The third aspect, the embodiments of the invention provide a kind of link switching device, applied to SDN switch, described device
Including：
Receiving module, the flow table issued for receiving and storing SDN controllers, wherein, the flow table includes the SDN
The priority of flow table item corresponding to each link of the interchanger itself between purpose equipment, the priority and the chain of each link
Road mass parameter is proportional；
Monitoring modular, for monitoring multilink of the SDN switch itself between the purpose equipment；
Modified module, it is local for when being currently used in the first link failure to E-Packet, changing the SDN switch
The priority of flow table item corresponding with first link in the flow table of storage, wherein, with described first in amended flow table
The priority of flow table item corresponding to link is less than the priority of flow table item corresponding to other links；
Selecting module, in flow table after the modification, selecting link forwarding report corresponding to the flow table item of highest priority
Text.
Fourth aspect, the embodiments of the invention provide a kind of link switching device, applied to SDN controllers, described device
Including：
Acquisition module, for obtain in the topology information of SDN, the SDN facility information of SDN switch and
Link attribute between the SDN switch and purpose equipment；
Determining module, for according to the topology information, the facility information and the link attribute, determining the SDN
In network between each SDN switch and purpose equipment each link link quality parameter；
Module is issued, for generating flow table and being issued to each SDN switch, so that the SDN switch is being currently used in
During the first link failure to E-Packet, the priority of flow table item corresponding with first link in the flow table is changed,
In amended flow table, link corresponding to the flow table item of highest priority is selected to E-Packet, wherein, each link in the flow table
The priority of corresponding flow table item and the link quality parameter of each link are proportional.
5th aspect, the embodiments of the invention provide a kind of SDN switch, the SDN switch includes processor, communication
Interface, memory and communication bus, wherein, the processor, the communication interface, the memory passes through the communication bus
Complete mutual communication；
The memory, for depositing computer program；
The processor, during for performing the program deposited on the memory, realize the method described in first aspect
Step.
6th aspect, the embodiments of the invention provide a kind of readable storage medium storing program for executing, is stored in SDN switch, described readable
Storage medium internal memory contains computer program, and the computer program realizes the method described in first aspect when being executed by processor
Step.
7th aspect, the embodiments of the invention provide a kind of SDN controllers, the SDN controllers include processor, communication
Interface, memory and communication bus, wherein, the processor, the communication interface, the memory passes through the communication bus
Complete mutual communication；
The memory, for depositing computer program；
The processor, during for performing the program deposited on the memory, realize the method described in second aspect
Step.
Eighth aspect, the embodiments of the invention provide a kind of readable storage medium storing program for executing, is stored in SDN controllers, described readable
Storage medium internal memory contains computer program, and the computer program realizes the method described in second aspect when being executed by processor
Step.
A kind of link switch-over method, device, SDN switch, controller and storage medium provided in an embodiment of the present invention,
The flow table that SDN switch is issued by receiving SDN controllers, a plurality of chain of the monitoring SDN switch itself between purpose equipment
The Link State on road, when being currently used in the first link failure to E-Packet, directly by changing in the flow table being locally stored
The priority of flow table item corresponding to first link, realizes the automatic switchover of link.When link breaks down, SDN switch can
Directly to be modified to the priority of flow table item in the flow table that is stored, without waiting SDN controllers to re-issue flow table,
Reduce the data volume of data transfer between SDN controllers and SDN switch, the quick automatic switching of link can be achieved, so as to
Packet loss of the message in repeating process is reduced, improves the success rate of message forwarding.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of the link switch-over method of the first aspect of the embodiment of the present invention；
Fig. 2 is another schematic flow sheet of the link switch-over method of the first aspect of the embodiment of the present invention；
Fig. 3 is the schematic flow sheet of the link switch-over method of the second aspect of the embodiment of the present invention；
Fig. 4 is a kind of structural representation of the link switching device of the third aspect of the embodiment of the present invention；
Fig. 5 is another structural representation of the link switching device of the third aspect of the embodiment of the present invention；
Fig. 6 is the structural representation of the link switching device of the fourth aspect of the embodiment of the present invention；
Fig. 7 is a kind of structural representation of the SDN switch of the embodiment of the present invention；
Fig. 8 is a kind of structural representation of the SDN controllers of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In order to realize the automatic switchover of link, to reduce packet loss of the message in repeating process, message forwarding is improved
Success rate, the embodiments of the invention provide a kind of link switch-over method, device, SDN switch, controller and storage medium.
A kind of link switch-over method applied to SDN switch provided first below the embodiment of the present invention is situated between
Continue.
It should be noted that because the embodiment of the present invention is applied under SDN framework, include in SDN framework
SDN controllers and SDN switch, SDN controllers can be based on network topology structure generation flow table, and be issued to SDN switch
Flow table, the flow table include flow table item corresponding to multiple ports or link, each flow table item contain again matching domain, priority,
The information such as action fields.Wherein, matching domain includes packet header domain, ingress port information etc., has corresponded to the information of SDN switch；Preferentially
Level can be understood as the execution sequence of each flow table item in flow table；Action fields illustrate the specific action of flow table item corresponding ports, example
Such as, output action output, input action input etc..SDN switch then can be matched and handled according to the flow table received
The information of message.In a kind of actual SDN framework, the communication interface standard between SDN controllers and forwarding uses
Open flows OpenFlow agreements, then under SDN framework, SDN switch is OpenFlow interchangers, and the OpenFlow is exchanged
Machine supports OpenFlow agreements, can be physical equipment, or virtual unit.SDN controllers pass through OpenFlow passages
OpenFlow interchangers are managed and configured, packet is sent to OpenFlow interchangers.Certainly, SDN framework base
The protection domain of the embodiment of the present invention is fallen within other agreements, is no longer repeated one by one here.
As shown in figure 1, a kind of link switch-over method that the embodiment of the present invention is provided, applied to SDN switch, the link
Switching method may include steps of：
S101, receive and store the flow table that SDN controllers issue.
Wherein, flow table includes the excellent of the flow table item corresponding to each link of the SDN switch itself between purpose equipment
First level, priority and the link quality parameter of each link are proportional.It can also include in the flow table that SDN controllers are issued
Facility information of the link information of link, the facility information of SDN switch and purpose equipment etc..SDN controllers are to network topology
Structure is periodically analyzed, and marks the port of SDN switch and correlation, and by the type selecting of circuit, agreement really
It is fixed etc., link quality parameter is determined according to the analysis to packet loss, time delay, link quality parameter embodies link in normal condition
The ability of lower transmitting message, link quality parameter can be set as specific numerical value, link by technical staff according to analysis result
Mass parameter is bigger, then illustrates that the ability of this link transmission message is stronger.Priority and the link quality parameter of each link
Proportional relation can be understood as：The link-quality of certain link is higher, then the priority of this link flow table item is higher.In order to just
In calculating and understanding, priority can be the numerical value equal with link quality parameter, for example, the link quality parameter of the first link
For 6, then the priority of flow table item corresponding to the first link is 6 in flow table；The link quality parameter of second link is 5, then flow table
In flow table item corresponding to the second link priority be 5, etc..SDN controllers to network topology interpretation of result by that can obtain
Arrive：For example, the first link is connected with the port port1 of SDN switch, the port port2 phases of the second link and SDN switch
Connect, the 3rd link is connected with the port port3 of SDN switch, etc..By analyzing the link-quality of link, it is determined that
The link-quality highest of first link, next to that the second link, worst is the 3rd link, and according to the height of link-quality, according to
Secondary that link is ranked up, then network architecture link and the link-quality table of comparisons are as shown in table 1.
Table 1
| All links in the network architecture | Link quality parameter value |
| First link | 6 |
| Second link | 5 |
| 3rd link | 4 |
SDN controllers can according to corresponding to link quality parameter determines each of the links flow table item priority, in order to just
In realization, priority can be made proportional with link quality parameter, specifically, can be directly by flow table corresponding to each bar link
The priority of item is arranged to the link quality parameter identical numerical value with this link.SDN controllers generate flow table item, the flow table
Item includes the information such as matching domain, priority, action fields, and SDN controllers issue matching domain and SDN switch to SDN switch
Match, and action fields are output action output multiple flow table items, for example, action fields are output action in SDN switch
Port corresponding to output flow table item is port1 (corresponding first link), port2 (corresponding second link) and port3 are (corresponding
3rd link), because priority is directly proportional to link quality parameter, based on above-mentioned example, the link quality parameter of the first link
Link quality parameter for the 6, second link is that the link quality parameter of the 5, the 3rd link is 4, then flow table corresponding to the first link
Priority be higher than the priority of flow table item corresponding to the second link, the priority of flow table item corresponding to the second link is higher than the
The priority of flow table item corresponding to three links.If by priority be arranged to link quality parameter identical numerical value, first
The priority of flow table item corresponding to link is that the priority of flow table item corresponding to the 6, second link is to be flowed corresponding to the 5, the 3rd link
The priority of list item is 4.
S102, multilink of the monitoring SDN switch itself between purpose equipment.
SDN switch can monitor its own multilink between purpose equipment in real time, and purpose equipment is another SDN
Interchanger.During in order to realize that the link of transmitting message breaks down between a SDN switch and a purpose equipment, do not influence to report
The transmission of text, in the embodiment of the present invention, multilink, and an end between the SDN switch and same purpose equipment be present
The corresponding link of mouth.First, the detection messages that SDN switch can be monitored between itself port and purpose equipment transmit shape
State, when detection messages transmission state is normal, SDN switch judges that link corresponding to the port is normal, when detection messages transmission
When state is abnormal, SDN switch judges link failure corresponding to the port, wherein, detection messages can be hello packet or
Echo messages, etc., SDN switch specifically can by BFD (Bidirectional Forwarding Detection, it is double
Detected to forwarding), the chain of the various ways monitored link such as NQA (Network Quality Analyzer, Network Quality Analysis)
Line state.Secondly as the Link State of link can be reflected directly on the port status of SDN switch, if port is UP
State, then illustrate that link is normal, if port is DOWN states, illustrate link failure；Therefore, monitoring side can directly be passed through
Mouth state, the Link State of link is obtained more quickly, improve the efficiency of link switching.
S103, when being currently used in the first link failure to E-Packet, in the flow table that modification SDN switch is locally stored
The priority of flow table item corresponding with the first link.
Wherein, the priority of flow table item corresponding with first link should less than other link pairs in amended flow table
Flow table item priority.Because SDN switch is the information according to the flow table received to match and handle message, and have
The matching of body and processing sequence are related to the priority of flow table item, and priority is higher, then is entered from link corresponding to the flow table item
Row processing, therefore, when link breaks down, the priority of the flow table item of faulty link can be changed it is small, in this manner it is possible to make
The normal link pair message of SDN switch priority match state is obtained to be handled.I.e., it is possible to by the link to break down at present
The priority of flow table item is changed to the priority less than flow table item corresponding to other links, makes follow-up message high using priority
Link is forwarded, and realizes the switching of link, for example, the link of current transmission message is the first link, the stream of first link
The priority of list item is 6, and the priority of the flow table item of the second link is 5, and the priority of the flow table item of the 3rd link is 4, the
When one link breaks down, the priority of the flow table item of the first link can be changed to 3 or smaller numerical value, then SDN is exchanged
Machine can determine to switch to the second link that the priority of flow table item is 5 to be transmitted by the priority of flow table item in flow table.
More excellent, the priority of the flow table item of the link to break down directly can be changed to 0.
S104, in flow table after the modification, link corresponding to the flow table item of highest priority is selected to E-Packet.
The priority of flow table item is the execution sequence of each flow table item in flow table in flow table, that is, corresponding ports or link
Message forwarding order, SDN switch selects link corresponding to the flow table item of highest priority to E-Packet all the time, with switching
To being currently available that packet loss is minimum in link, time delay is minimum link is used to E-Packet, to ensure the forwarding rate of message
And success rate.Corresponding to above-mentioned example, due to the highest priority of flow table item corresponding to the first link, then now message according to stream
List item is forwarded from port port1 by the first link.As shown in table 2, situation and message forwarding path are issued for flow table item.
Table 2
Using the present embodiment, flow table that SDN switch is issued by receiving SDN controllers, monitoring SDN switch itself with
The Link State of multilink between purpose equipment, when being currently used in the first link failure to E-Packet, directly pass through
The priority of flow table item corresponding to the first link in the flow table being locally stored is changed, realizes the automatic switchover of link.Sent out in link
During raw failure, SDN switch directly can modify to the priority of flow table item in the flow table that is stored, without waiting
SDN controllers re-issue flow table, reduce the data volume of data transfer between SDN controllers and SDN switch, and chain can be achieved
The quick automatic switching on road, so as to reduce packet loss of the message in repeating process, improve the success rate of message forwarding.
Based on embodiment illustrated in fig. 1, as shown in Fig. 2 be another link switch-over method in the embodiment of the present invention, this method
Specifically it may include steps of：
S201, receive and store the flow table that SDN controllers issue.
S202, record initial priority corresponding to each link.
Situation about recovering in view of faulty link, when receiving flow table, can record the initial excellent of each link respectively
First level and current priority.
S203, multilink of the monitoring SDN switch itself between purpose equipment
S204, when being currently used in the first link failure to E-Packet, in the flow table that modification SDN switch is locally stored
The priority of flow table item corresponding with the first link.
S205, in flow table after the modification, link corresponding to the flow table item of highest priority is selected to E-Packet.
S206, in the fault recovery of the first link, change the priority of flow table item corresponding with the first link in flow table
For initial priority.
It is determined that during the first link failure, modification current priority is 0, and initial priority keeps constant.In fault recovery
When, it is necessary to E-Packeted by the first link-recovery, then the current priority of the first link can be revised as initial priority.
Using the present embodiment, the corresponding relation between link-quality and priority is established, so as to select link matter
Measure highest link and carry out message forwarding, and when being broken down in link, what SDN switch was directly locally stored by modification
The priority of flow table item corresponding to first link in flow table, the quick automatic switching of link is realized, thought highly of without waiting for SDN controls
Flow table newly is issued, reduces the data volume of data transfer between SDN controllers and SDN switch, is being turned so as to reduce message
Packet loss during hair, improve the success rate of message forwarding.
It should be noted that S201, S203, S204, S205 in the present embodiment S101 with embodiment illustrated in fig. 1 respectively
It is identical to S104, there is same or analogous beneficial effect, no longer repeat one by one here.
A kind of link switch-over method applied to SDN controllers provided below the embodiment of the present invention is introduced.
As shown in figure 3, a kind of link switch-over method that the embodiment of the present invention is provided, applied to SDN controllers, this method
It may include steps of：
S301, obtain each in the facility information of SDN switch and SDN in the topology information of SDN, SDN
Link attribute corresponding to facility information between SDN switch and purpose equipment.
In order to obtain the link quality parameter related to priority, SDN controllers can be believed the topology of SDN
Breath, SDN switch and purpose equipment corresponding to each facility information in the facility information of SDN switch and SDN in SDN
Between link attribute obtained.
S302, according to topology information, facility information and link attribute, determine that each SDN switch is set with purpose in SDN
The link quality parameter of each link between standby.
The facility information and SDN of SDN controllers SDN switch in the topology information of SDN, SDN is got
After link attribute in network corresponding to each facility information between SDN switch and purpose equipment, network topology structure is carried out
Periodically analysis, the port of SDN switch and correlation, and determination of type selecting, agreement for passing through circuit etc. are marked, according to
Analysis to link attributes such as packet loss, time delays, determines link quality parameter, and link quality parameter embodies link in positive reason
The ability of transmitting message under condition, link quality parameter can be set as specific numerical value, chain by technical staff according to analysis result
Road mass parameter is bigger, then illustrates that the ability of this link transmission message is stronger.
S303, generation flow table are simultaneously issued to each SDN switch so that SDN switch be currently used in E-Packet the
During one link failure, the priority of flow table item corresponding with first link in flow table is changed, in flow table after the modification, choosing
Link corresponding to selecting priority highest flow table item E-Packets.
Wherein, the priority of the flow table item corresponding to each link in flow table is directly proportional to the link quality parameter of each link
Relation.SDN controllers determine the priority of flow table item corresponding to each link, and link-quality is joined according to link quality parameter
Number is proportional with priority, it can be understood as：Link quality parameter is bigger, then flow table item corresponding to this link is preferential
Level is higher.For the ease of calculating and understanding, priority can be arranged to the numerical value equal with link quality parameter, for example, the
The link quality parameter of one link is 6, it is determined that the priority of flow table item corresponding to the first link is 6；The link of second link
Mass parameter is 5, it is determined that the priority of flow table item corresponding to the second link is 5, etc..It can also be wrapped in the flow table generated
Include facility information of the link information of link, the facility information of SDN switch and purpose equipment etc..
Using the present embodiment, flow table that SDN switch is issued by receiving SDN controllers, monitoring SDN switch itself with
The Link State of multilink between purpose equipment, when being currently used in the first link failure to E-Packet, directly pass through
The priority of flow table item corresponding to the first link in the flow table being locally stored is changed, realizes the automatic switchover of link.Sent out in link
During raw failure, SDN switch directly can modify to the priority of flow table item in the flow table that is stored, without waiting
SDN controllers re-issue flow table, reduce the data volume of data transfer between SDN controllers and SDN switch, and chain can be achieved
The quick automatic switching on road, so as to reduce packet loss of the message in repeating process, improve the success rate of message forwarding.
A kind of executive agent for link switch-over method that the embodiment of the present invention is provided is SDN switch or SDN controllers,
Two equipment have certain data-handling capacity, and therefore, difference can include such as DSP (Digital Signal
Processor, digital signal processor), ARM (Advanced Reduced Instruction Set Computer
Machines, Reduced Instruction Set Computer microprocessor) or FPGA (Field-Programmable Gate Array, scene
Programmable gate array) etc. kernel processor chip.Wherein, a kind of side for link switch-over method that the embodiment of the present invention is provided is realized
Formula can be to be arranged at least one of SDN switch or software, hardware circuit and logic circuit in SDN controllers.
Corresponding to above method embodiment, the embodiments of the invention provide a kind of link switching device, is exchanged applied to SDN
Machine, as shown in figure 4, the link switching device can include：
Receiving module 410, the flow table issued for receiving and storing SDN controllers, wherein, the flow table includes described
The priority of flow table item corresponding to each link of the SDN switch itself between purpose equipment, the priority and each link
Link quality parameter it is proportional；
Monitoring modular 420, for monitoring multilink of the SDN switch itself between the purpose equipment；
Modified module 430, for when being currently used in the first link failure to E-Packet, changing the SDN switch
The priority of flow table item corresponding with first link in the flow table being locally stored, wherein, in amended flow table with it is described
The priority of flow table item corresponding to first link is less than the priority of flow table item corresponding to other links；
Selecting module 440, in flow table after the modification, selecting link corresponding to the flow table item of highest priority to forward
Message.
Based on embodiment illustrated in fig. 4, as shown in figure 5, the embodiment of the present invention additionally provides a kind of link switching device, the dress
Putting to include：
Receiving module 510, the flow table issued for receiving and storing SDN controllers, wherein, the flow table includes described
The priority of flow table item corresponding to each link of the SDN switch itself between purpose equipment, the priority and each link
Link quality parameter it is proportional；
Logging modle 520, for recording initial priority corresponding to each link；
Monitoring modular 530, for monitoring multilink of the SDN switch itself between the purpose equipment；
Modified module 540, for when being currently used in the first link failure to E-Packet, changing the SDN switch
The priority of flow table item corresponding with first link in the flow table being locally stored, wherein, in amended flow table with it is described
The priority of flow table item corresponding to first link is less than the priority of flow table item corresponding to other links；
Selecting module 550, in flow table after the modification, selecting link corresponding to the flow table item of highest priority to forward
Message.
Optionally, the modified module 540 specifically can be also used for：
In the fault recovery of first link, flow table item corresponding with first link in the flow table is changed
Priority is the initial priority.
Using the present embodiment, the corresponding relation between link-quality and priority is established, so as to select link matter
Measure highest link and carry out message forwarding, and when being broken down in link, what SDN switch was directly locally stored by modification
The priority of flow table item corresponding to first link in flow table, the quick automatic switching of link is realized, thought highly of without waiting for SDN controls
Flow table newly is issued, reduces the data volume of data transfer between SDN controllers and SDN switch, is being turned so as to reduce message
Packet loss during hair, improve the success rate of message forwarding.
It should be noted that receiving module 510, monitoring modular 530, modified module 540, selecting module in the present embodiment
550 respectively the receiving module 410 with embodiment illustrated in fig. 4, monitoring modular 420, modified module 430, selecting module 440 it is identical,
With same or analogous beneficial effect.
Corresponding to above method embodiment, the embodiments of the invention provide a kind of link switching device, is controlled applied to SDN
Device, as shown in fig. 6, the link switching device can include：
Acquisition module 610, for obtaining the equipment letter of SDN switch in the topology information of SDN, the SDN
Breath and the link attribute between the SDN switch and purpose equipment；
Determining module 620, for according to the topology information, the facility information and the link attribute, it is determined that described
In SDN between each SDN switch and purpose equipment each link link quality parameter；
Module 630 is issued, for generating flow table and being issued to each SDN switch, so that the SDN switch is used currently
When the first link failure to E-Packet, the priority of flow table item corresponding with first link in the flow table is changed,
In flow table after the modification, link corresponding to the flow table item of highest priority is selected to E-Packet, wherein, each chain in the flow table
The priority of flow table item corresponding to road and the link quality parameter of each link are proportional.
Using the present embodiment, flow table that SDN switch is issued by receiving SDN controllers, monitoring SDN switch itself with
The Link State of multilink between purpose equipment, when being currently used in the first link failure to E-Packet, directly pass through
The priority of flow table item corresponding to the first link in the flow table being locally stored is changed, realizes the automatic switchover of link.Sent out in link
During raw failure, SDN switch directly can modify to the priority of flow table item in the flow table that is stored, without waiting
SDN controllers re-issue flow table, reduce the data volume of data transfer between SDN controllers and SDN switch, and chain can be achieved
The quick automatic switching on road, so as to reduce packet loss of the message in repeating process, improve the success rate of message forwarding.
It should be noted that the link switching device of the embodiment of the present invention is the device of the above-mentioned link switch-over method of application,
Then all embodiments of above-mentioned link switch-over method are applied to the device, and can reach same or analogous beneficial effect.
In order to solve problem of the prior art, the embodiment of the present invention additionally provides a kind of SDN switch, as shown in fig. 7,
SDN switch 700 can include：Processor 710, communication interface 720, memory 730 and communication bus 740, wherein, the place
Device 710, the communication interface 720 are managed, the memory 730 completes mutual communication by the communication bus 740,
The memory 730, for depositing computer program；
The processor 710, during for performing the program deposited on the memory 730, realize following steps：
Receive and store the flow table that SDN controllers issue, wherein, the flow table include the SDN switch itself with
The priority of the flow table item corresponding to each link between purpose equipment, the link quality parameter of the priority and each link into
Proportional relation；
Monitor multilink of the SDN switch itself between the purpose equipment；
When being currently used in the first link failure to E-Packet, change in the flow table that the SDN switch is locally stored
The priority of flow table item corresponding with first link, wherein, stream corresponding with first link in amended flow table
The priority of list item is less than the priority of flow table item corresponding to other links；
In flow table after the modification, link corresponding to the flow table item of highest priority is selected to E-Packet.
The link switch-over method provided corresponding to above-described embodiment, the embodiments of the invention provide a kind of readable storage medium
Matter, SDN switch is stored in, for storing computer program, when the computer program is executed by processor, realizes following step
Suddenly：
Receive and store the flow table that SDN controllers issue, wherein, the flow table include the SDN switch itself with
The priority of the flow table item corresponding to each link between purpose equipment, the link quality parameter of the priority and each link into
Proportional relation；
Monitor multilink of the SDN switch itself between the purpose equipment；
When being currently used in the first link failure to E-Packet, change in the flow table that the SDN switch is locally stored
The priority of flow table item corresponding with first link, wherein, stream corresponding with first link in amended flow table
The priority of list item is less than the priority of flow table item corresponding to other links；
In flow table after the modification, link corresponding to the flow table item of highest priority is selected to E-Packet.
In order to solve problem of the prior art, the embodiment of the present invention additionally provides a kind of SDN controllers, as shown in figure 8,
SDN controllers 800 can include：Processor 810, communication interface 820, memory 830 and communication bus 840, wherein, the place
Device 810, the communication interface 820 are managed, the memory 830 completes mutual communication by the communication bus 840,
The memory 830, for depositing computer program；
The processor 810, during for performing the program deposited on the memory 830, realize following steps：
Obtain the facility information of SDN switch and the SDN switch in the topology information of SDN, the SDN
Link attribute between purpose equipment；
According to the topology information, the facility information and the link attribute, determine that each SDN is handed in the SDN
Change planes the link quality parameter of between purpose equipment each link；
Generation flow table is simultaneously issued to each SDN switch so that the SDN switch be currently used in E-Packet first
During link failure, the priority of flow table item corresponding with first link in the flow table is changed, in flow table after the modification,
Link corresponding to the flow table item of highest priority is selected to E-Packet, wherein, the flow table item in the flow table corresponding to each link
Priority and the link quality parameter of each link it is proportional.
The communication bus mentioned in above-mentioned SDN switch and SDN controllers can be Peripheral Component Interconnect standard
(Peripheral Component Interconnect, abbreviation PCI) bus or EISA (Extended
Industry Standard Architecture, abbreviation EISA) bus etc..Communication bus can be divided into address bus, data
Bus, controlling bus etc..For ease of representing, only represented in figure with a thick line, it is not intended that an only bus or one kind
The bus of type.
The communication that communication interface is used between above-mentioned SDN switch and SDN controllers and other equipment.
Memory can include random access memory (Random Access Memory, abbreviation RAM), can also include
Nonvolatile memory (non-volatile memory), for example, at least a magnetic disk storage.Optionally, memory may be used also
To be at least one storage device for being located remotely from aforementioned processor.
Above-mentioned processor can be general processor, including central processing unit (Central Processing Unit,
Abbreviation CPU), network processing unit (Network Processor, abbreviation NP) etc.；It can also be digital signal processor
(Digital Signal Processing, abbreviation DSP), application specific integrated circuit (Application Specific
Integrated Circuit, abbreviation ASIC), field programmable gate array (Field-Programmable Gate Array,
Abbreviation FPGA) either other PLDs, discrete gate or transistor logic, discrete hardware components.
In the present embodiment, computer journey that the processor of SDN switch and SDN controllers is stored by reading in memory
Sequence, and by running computer program, can realize：The flow table that SDN switch issues by receiving SDN controllers, monitor SDN
The Link State of multilink of the interchanger itself between purpose equipment, it is being currently used in the first link failure for E-Packeting
When, directly by changing the priority of flow table item corresponding to the first link in the flow table being locally stored, realize that the automatic of link cuts
Change.When link breaks down, SDN switch directly can modify to the priority of flow table item in the flow table that is stored,
Without waiting SDN controllers to re-issue flow table, reduce the data of data transfer between SDN controllers and SDN switch
Amount, the quick automatic switching of link can be achieved, so as to reduce packet loss of the message in repeating process, improve message forwarding
Success rate.
The link switch-over method provided corresponding to above-described embodiment, the embodiments of the invention provide a kind of readable storage medium
Matter, SDN controllers are stored in, for storing computer program, when the computer program is executed by processor, realize following step
Suddenly：
Obtain the facility information of SDN switch and the SDN switch in the topology information of SDN, the SDN
Link attribute between purpose equipment；
According to the topology information, the facility information and the link attribute, determine that each SDN is handed in the SDN
Change planes the link quality parameter of between purpose equipment each link；
Generation flow table is simultaneously issued to each SDN switch so that the SDN switch be currently used in E-Packet first
During link failure, the priority of flow table item corresponding with first link in the flow table is changed, in flow table after the modification,
Link corresponding to the flow table item of highest priority is selected to E-Packet, wherein, the flow table item in the flow table corresponding to each link
Priority and the link quality parameter of each link it is proportional.
In the present embodiment, it is stored in the readable storage medium storing program for executing of SDN switch and is stored in the readable storage medium of SDN controllers
Matter is stored with the application program for operationally performing the link switch-over method that the embodiment of the present application is provided, therefore can realize：
The flow table that SDN switch is issued by receiving SDN controllers, a plurality of chain of the monitoring SDN switch itself between purpose equipment
The Link State on road, when being currently used in the first link failure to E-Packet, directly by changing in the flow table being locally stored
The priority of flow table item corresponding to first link, realizes the automatic switchover of link.When link breaks down, SDN switch can
Directly to be modified to the priority of flow table item in the flow table that is stored, without waiting SDN controllers to re-issue flow table,
Reduce the data volume of data transfer between SDN controllers and SDN switch, the quick automatic switching of link can be achieved, so as to
Packet loss of the message in repeating process is reduced, improves the success rate of message forwarding.
For SDN switch, the readable storage medium storing program for executing for being stored in SDN switch, SDN controllers and it is stored in SDN controls
For the readable storage medium storing program for executing embodiment of device processed, implement because the method content involved by it is substantially similar to foregoing method
Example, so description is fairly simple, the relevent part can refer to the partial explaination of embodiments of method.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element also be present in process, method, article or equipment including the key element.
Each embodiment in this specification is described by the way of related, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.It is real especially for system
For applying example, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is referring to embodiment of the method
Part explanation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of link switch-over method, it is characterised in that applied to software defined network SDN switch, methods described includes：
The flow table that SDN controllers issue is received and stores, wherein, the flow table includes the SDN switch itself and purpose
The priority of the flow table item corresponding to each link between equipment, the priority are directly proportional to the link quality parameter of each link
Relation；
Monitor multilink of the SDN switch itself between the purpose equipment；
When being currently used in the first link failure to E-Packet, change in the flow table that the SDN switch is locally stored with institute
The priority of flow table item corresponding to the first link is stated, wherein, flow table item corresponding with first link in amended flow table
Priority be less than flow table item corresponding to other links priority；
In flow table after the modification, link corresponding to the flow table item of highest priority is selected to E-Packet.
2. according to the method for claim 1, it is characterised in that after receiving and storing the flow table that SDN controllers issue,
Methods described also includes：
Record initial priority corresponding to each link；
In the flow table after the modification, select after link E-Packets corresponding to the flow table item of highest priority, the side
Method also includes：
In the fault recovery of first link, the preferential of flow table item corresponding with first link in the flow table is changed
Level is the initial priority.
3. a kind of link switch-over method, it is characterised in that applied to SDN controllers, methods described includes：
Obtain the facility information and the SDN switch and mesh of SDN switch in the topology information of SDN, the SDN
Equipment between link attribute；
According to the topology information, the facility information and the link attribute, each SDN switch in the SDN is determined
The link quality parameter of each link between purpose equipment；
Generation flow table is simultaneously issued to each SDN switch, so that the SDN switch is being currently used in the first link for E-Packeting
During failure, the priority of flow table item corresponding with first link in the flow table is changed, in flow table after the modification, selection
Link corresponding to the flow table item of highest priority E-Packets, wherein, flow table item in the flow table corresponding to each link it is excellent
First level and the link quality parameter of each link are proportional.
4. a kind of link switching device, it is characterised in that applied to SDN switch, described device includes：
Receiving module, the flow table issued for receiving and storing SDN controllers, wherein, the flow table includes the SDN and exchanged
The priority of flow table item corresponding to each link of the machine itself between purpose equipment, the priority and the link matter of each link
It is proportional to measure parameter；
Monitoring modular, for monitoring multilink of the SDN switch itself between the purpose equipment；
Modified module, it is locally stored for when being currently used in the first link failure to E-Packet, changing the SDN switch
Flow table in flow table item corresponding with first link priority, wherein, in amended flow table with first link
The priority of corresponding flow table item is less than the priority of flow table item corresponding to other links；
Selecting module, in flow table after the modification, selecting link corresponding to the flow table item of highest priority to E-Packet.
5. device according to claim 4, it is characterised in that described device also includes：
Logging modle, for recording initial priority corresponding to each link；
The modified module, is additionally operable to：In the fault recovery of first link, change in the flow table with first chain
The priority of flow table item corresponding to road is the initial priority.
6. a kind of link switching device, it is characterised in that applied to SDN controllers, described device includes：
Acquisition module, for obtaining in the topology information of SDN, the SDN facility information of SDN switch and described
Link attribute between SDN switch and purpose equipment；
Determining module, for according to the topology information, the facility information and the link attribute, determining the SDN
In between each SDN switch and purpose equipment each link link quality parameter；
Module is issued, for generating flow table and being issued to each SDN switch, so that the SDN switch is being currently used in forwarding
During the first link failure of message, the priority of flow table item corresponding with first link in the flow table is changed, is being changed
In flow table afterwards, link corresponding to the flow table item of highest priority is selected to E-Packet, wherein, each link institute is right in the flow table
The priority for the flow table item answered and the link quality parameter of each link are proportional.
7. a kind of SDN switch, it is characterised in that the SDN switch includes processor, communication interface, memory and communication
Bus, wherein, the processor, the communication interface, the memory passes through the communication bus and completes mutual communication；
The memory, for depositing computer program；
The processor, during for performing the program deposited on the memory, realize the method described in claim 1 or 2
Step.
8. a kind of readable storage medium storing program for executing, it is characterised in that be stored in SDN switch, the readable storage medium storing program for executing internal memory contains meter
Calculation machine program, the computer program realize the method and step described in claim 1 or 2 when being executed by processor.
9. a kind of SDN controllers, it is characterised in that the SDN controllers include processor, communication interface, memory and communication
Bus, wherein, the processor, the communication interface, the memory passes through the communication bus and completes mutual communication；
The memory, for depositing computer program；
The processor, during for performing the program deposited on the memory, realize the method step described in claim 3
Suddenly.
10. a kind of readable storage medium storing program for executing, it is characterised in that be stored in SDN controllers, the readable storage medium storing program for executing internal memory contains meter
Calculation machine program, the computer program realize the method and step described in claim 3 when being executed by processor.
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| CN201710451686.XA CN107547249A (en) | 2017-06-15 | 2017-06-15 | Link switch-over method, device, SDN switch, controller and storage medium |
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| CN108566298A (en) * | 2018-04-12 | 2018-09-21 | 联想(北京)有限公司 | A kind of link failure processing method, interchanger and link failure processing system |
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| CN108322836A (en) * | 2018-01-24 | 2018-07-24 | 北京奇艺世纪科技有限公司 | A kind of method and device of data transmission |
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| CN109117111A (en) * | 2018-07-27 | 2019-01-01 | Oppo广东移动通信有限公司 | Transmission link method for handover control and Related product |
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| CN109995657A (en) * | 2019-03-19 | 2019-07-09 | 新华三技术有限公司合肥分公司 | A kind of method and device of flow forwarding |
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| CN111275517A (en) * | 2020-01-14 | 2020-06-12 | 拉扎斯网络科技（上海）有限公司 | Link information display method and device, storage medium and terminal |
| CN112104576B (en) * | 2020-08-14 | 2022-02-22 | 中国科学院声学研究所 | Resident flow table storage and calibration method of SDN switch |
| CN112104576A (en) * | 2020-08-14 | 2020-12-18 | 中国科学院声学研究所 | Resident flow table storage and calibration method and system of SDN switch |
| CN112491700A (en) * | 2020-12-14 | 2021-03-12 | 成都颜创启新信息技术有限公司 | Network path adjusting method, system, device, electronic equipment and storage medium |
| CN113630178A (en) * | 2021-08-18 | 2021-11-09 | 新华三信息安全技术有限公司 | Message transmission method and device |
| CN113824595A (en) * | 2021-09-29 | 2021-12-21 | 联想(北京)有限公司 | Link switching control method and device and gateway equipment |
| CN114401184B (en) * | 2021-12-07 | 2023-12-22 | 成都市联洲国际技术有限公司 | Network communication equipment and method thereof, electronic equipment and medium |
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| CN114285782A (en) * | 2021-12-22 | 2022-04-05 | 深圳电器公司 | Data processing method and related device |
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